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Decoding the Cambrian Radiation

机译:解码寒武纪辐射

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摘要

The recent surge in interest in the origins of multicellular animals (metazoans) is fueled by new evidence from three major sources: molecular sequencing, the study of evolutionary development and the discovery of exceptionally preserved fossils of Precambrian and Cambrian age, particularly from China. Genetic sequences provide a means of analyzing how the major animal groups are related and of estimating their time of origin (us- ing the molecular clock)—a means that is independent of morphological data and the record of evolutionary events the fossils reveal. The study of developmental processes in an evolutionary framework ("evo-devo") provides the link between genetics and morphology. These new approaches have prompted molecular biologists to join forces with paleontologists to focus on the sequence of events leading to the origin of body plans before and during the Cambrian Period (543 to 500 million years ago).
机译:最近来自三大来源的新证据推动了人们对多细胞动物(metazoans)起源的兴趣激增:分子测序,进化发展研究以及发现特别是来自中国的前寒武纪和寒武纪时期化石的发现。遗传序列提供了一种方法,可以分析主要动物群之间的关系,并估计它们的起源时间(使用分子钟),这种方法与形态数据和化石揭示的进化事件记录无关。在进化框架(“ evo-devo”)中对发展过程的研究提供了遗传学和形态学之间的联系。这些新方法促使分子生物学家与古生物学家共同努力,着眼于导致寒武纪之前和之中(543至5亿年前)身体计划起源的一系列事件。

著录项

  • 来源
    《American Scientist》 |2005年第3期|p.268-270|共3页
  • 作者

    Derek E. G. Briggs;

  • 作者单位

    Department of Geology and Geophysics at Yale University;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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